MLA

Hughes, Langston, 1902-1967. Reed, Ishmael. Box 136, folder 2523. 1963, 1966, n.d.. https://collections.library.yale.edu/catalog/32468657.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 136, folder 2523"])(1963, 1966, n.d.)[Reed, Ishmael]. https://collections.library.yale.edu/catalog/32468657.